Bird feeder



FIG. 1 is a side elevation of a bird feeder embodying my new design;

FIG. 2 is another side elevation thereof, with the bird feeder turned 90 degrees to FIG. 1;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof; and

FIG. 5 is a fragmentary cross sectional view of the bottom portion thereof. 

The ornamental design for a bird feeder, as shown. 